Harmonic party-line telephone-ringer.



CLJ. ERICKSON.

HARMONIG PARTY LINBTELEPHONE RINGER.

APPLLOATION FILED AUG.`11, 190e.

1,051,989 Patented Feb. 4, 1913- tiErEEn sra'rEs PATENT oEEioE.

CHARLES J. ERICKSON, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 FIRST TRUST AND SAVINGS BANK, TRUSTEE, OF CHICAGO, ILLINOIS.

HARMONIC PARTY-LINE TELEPHONE-RINGER.

Application filed August 11, 1906.

Specification of Letters Patent.

y.Patented Feb. 4,1913.

Serial No. 330,191.

To all whom 15 may concern Be it known that l, CHARLES J. ERICK- soN, a citizen of the United States ot America, and resident otl Chicago, Cook count-y, Illinois, have invented a certain new and useful Improvement in Harmonic Party-Line Telephone-Ringers, ot which the tollowing is a specification.

My invention relates to harmonic ringers tor use in party line selective signaling systems.

The object ot' my invention is to provide improved means tor supporting the striker or bell-clapper of a harmonie ringer, and to provide certain details and teaturesotim.-

Vprovement and combinations tending to increase the general efficiency and serviceahility ot a harmonie ringer ot this partienlar character, as will hereinafter more tu't'ip appear.

To the foregoing and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a front elevation ot a harmonic bell or ringer embodying theI principles of my invention. Fig. 2 is a detail front elevation of the striker and armature, together with mounting tor the same, the striker-arm heing broken away t'or convenience of illustration. Fig. 3 is a section on line 3-3 in Fig. l. 'Fig 4 is a section on line 4 4 in Fig. Q.

As thus illustrated, my improved ringer comprises a bracket-plate A upon which are mounted the usual gongs B, B. The perma-v nent magnet. C has its upper end suitably 'secured to a. plate D, which latter is supported from the bottom of the plate A. The electromagnets E have their upper ends secured to the plate l), and are arranged one at either side ot the permanentmagnet. The lower end of the said permanent magnet is provided with an opening f', as shown more clearly in F ig. 4. The striker F is supported on the usual strikerarm G, which lat-ter has a springv or resilient portion g and a lower and enlarged threaded portion g1. The armature H is secured to the said striker ata point just above the said springy or resilient ortion f] preferably by a screw l1., whereby tie arma ture can lbe moved up and down on the said striker-arm. The threaded portion g1 of the said striker-arm extends downwardly through the opening c and is clamped in place by threaded elampin nuts g2, said nuts arranged above and elow the said lower portion or pole-piece of the said-per; manent magnet. lVith this arrangement the striker is flexibly mounted u on the permanent magnet, the striker-arm eing all in one piece, the portion g insuringthe requisite degree of flexibility. This \portion g/ can, of course, he of any suitable degree of thickness or st` ength, whereby the ditferent ringers on a party line can all be adapted to respond to ringing currents of diHerent frequencies, each ringer being tuned, so to speak, to respond to some particular frequency.

It will be understood that/the permanent magnetC has its upper end or pole-piece magnetically connected with the cores or pole-pieces of the electro-magnets.

lVhat I claim as my invention is l. In a bell or ringer, a permanent magnet, a spring extending from the said permanent magnet having a portion secured thereto, an armature supported by and mounted at right-angles to the end of said spring, a striker, a rod extending crosswise ot the armature to connect the striker with the spring, electromagnetic means for operating said armature. and sound-producing means to be engaged by said striker, said armature adjustable relatively to the electromagneticI means and spring.

2. The combination ot' a permanent magnet, an electromagnet, a spring having one end thereofl mounted on the. permanent magnet, an armature having its middle port-ion secured at right angles t the spring, adapted to be adjusted lengthwise of said spring, and suitable means operated by said armature when the latter is vibrated by the electromagnet.

3. The combination ot' a permanent magnet, a two-core electromagnet, an armature having its end portions disposed opposite the two cores ot' the electromagnet, a spring mounted on the permanent magnet, said armature mounted upon and flexibly supported by said springr and adapted to he adjusted lengthwise of said spring, and suitable means operated by the armature when the latter is operated by the eleetromagnet.

4. In a bell or ringer, the combination of a permanent magnet, a striker provided with a springr having one end thereof secured to said permanent magnet, an armature supported by the other end of said spring,- adapted to be adjusted lengthwise of said Spring, eleetromagnet cores having their ends disposed opposite the ends of Said armature, and sound-producing means to be engaged by said striker when the armature flexibly supported by Said spring is Vibrated by the said eleetromagnet cores.

In a bell or ringer, a permanent magnet, a striker-erin made in one piece and provided Wit-h a flexible portion and a serewethreaded portion, means for securing the screw-threaded portion in an integral portion of the said permanent magnet, an armature and a striker mounted on the strikenarm above the flexible portion there- Loenen@ of, eletromagnets for operating said armature, and gongs to he engaged by said striker. Y

. 6. rlhe combination of a permanent magnet, a screw-threaded portion, means engaging said serew-threaded portion to adjustably hold the same inthe end of said permanent magnet, a striker-rod provided With a striker, a spring integrally and flexibly connect-ing the said screw-threaded portion with the said striker-rod, an armatureA mounted erosswise of the strlker-rod, elecf tromagnet cores adapted tosacton the opv positeends of saidarmature, and soundprodueing means to be engaged by said CHARLES J. nnroiison.

lliinesses:

EDWARD D. FALES, JOHN ERICKSON. 

